Home / 5,420.88-8,131.32-2,135.52

Finding the Fourth Proportional to 5,420.88, 8,131.32 and 2,135.52

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Solution

The fourth proportional to 5,420.88, 8,131.32 and 2,135.52 is: 3,203.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.88 : 8,131.32 = 2,135.52 : x
  2. Step 2: Convert to fraction form
    5,420.88/8,131.32 = 2,135.52/x
  3. Step 3: Cross multiply
    5,420.88x = 8,131.32 × 2,135.52
  4. Step 4: Simplify right side
    5,420.88x = 17,364,596.49
  5. Step 5: Solve for x
    x = 17,364,596.49/5,420.88
  6. Step 6: Final answer
    x = 3,203.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.